Audio demonstration kit

ABSTRACT

An audio demonstration kit encourages understanding of audio concepts by enabling children to construct and study speaker performance. In a particular embodiment, the audio demonstration kit includes a paper speaker and instructions. The paper speaker includes a backplate, a suspension, and a diaphragm cut from a single sheet of paper. The demonstration kit may feature an amplifier that is configurable to accommodate various hardware additions as a child is ready for more progressively challenging construction. For example, the amplifier of an embodiment allows single and dual mode operation, as well as drives a rotary motor and is coordinated with a strobe light. The amplifier of an embodiment is synchronized with the strobe light and a moveable platform to create the impression of that jiggling figures attached to the table are dancing. Interfaces with smart phone, recording, and other technologies further enhances and encourages the learning experience.

I. CLAIM OF PRIORITY

This application is a continuation patent application of, and claimspriority from, U.S. Provisional Patent Application Ser. No. 61/880,663,filed on Sep. 20, 2013 and entitled, “Audio Demonstration Kit,” which isincorporated by reference herein in its entirety for all purposes.

II. FIELD OF THE DISCLOSURE

The present disclosure relates to an audio demonstration kit andcomponents thereof.

III. BACKGROUND

With the increase in prevalence of mobile computing devices, childrenare being introduced to computing technology at a younger age. Forexample, it is common for a child to be proficient in operating a mobilephone or a tablet computer. It is desirable to encourage children'sinterest and familiarity with aspects of audio, video, andcommunications technologies.

IV. SUMMARY OF THE DISCLOSURE

In a particular example, an audio demonstration kit includes a magnet, abobbin, and a wire. The audio demonstration kit also includes a singlesheet of paper that is manipulatable to form a paper speaker that isassembled by at least assembling a wire coil by winding the wire aroundthe bobbin, attaching the wire coil to a first location on the singlesheet of paper, attaching the magnet to a second location on the singlesheet of paper, and folding the single sheet of paper to place the wirecoil around the magnet.

In another particular example, an audio demonstration kit includes apaper speaker. The paper speaker includes a back support, a suspension,and a diaphragm cut from a single sheet of paper. The audiodemonstration kit further includes an amplifier that is connectable tothe paper speaker.

In another particular example, an audio demonstration kit includes anamplifier module having an input and a first output and a second output.The audio demonstration kit also includes a speaker kit having a firstand second box, each forming at least a partial enclosure, and a firstand second acoustic transducer. A first speaker is assembled by at leastassembling the first acoustic transducer into the first box andconnecting the first acoustic transducer to the first output of theamplifier module. A second speaker is assembled by at least assemblingthe second acoustic transducer into the second box and connecting thesecond acoustic transducer to the second output of the amplifier module.

Other aspects, advantages, and features of the present disclosure willbecome apparent after review of the entire application, including thefollowing sections: Brief Description of the Drawings, DetailedDescription, and the Claims.

V. BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a diagram of an illustrative embodiment of a single sheet ofpaper including instructions to form a paper speaker from the singlesheet of paper;

FIG. 2 is a diagram of an illustrative embodiment of a paper speakerformed from the single sheet of paper illustrated in FIG. 1;

FIG. 3 is a diagram of an illustrative embodiment of components of anaudio demonstration kit;

FIG. 4 shows a perspective view of an illustrative embodiment of anamplifier;

FIG. 5 is a diagram that illustrates assembling the paper speaker ofFIG. 2;

FIG. 6 is a diagram of an illustrative embodiment of an audiodemonstration kit including stereo speakers constructed from packagingof the audio demonstration kit;

FIG. 7 is a diagram of an illustrative embodiment of packagingassociated with an audio demonstration kit;

FIG. 8 is a diagram of the packaging of FIG. 7 when opened;

FIG. 9 is a diagram of an illustrative embodiment of a mixed mode audiodemonstration kit;

FIG. 10 shows an embodiment of an audio demonstration kit that includesspeakers that are constructed and deconstructed in a repeatable manner;

FIGS. 11A, 11B, and 11C are diagrams of illustrative embodiments of anaudio demonstration kit that includes an oscillating element or a rotarymotor;

FIG. 12 is a diagram of an illustrative embodiment of an audiodemonstration kit that includes a motion element;

FIG. 13 is a perspective view of an audio demonstration kit thatincludes an amplifier and moveable assembly that are synchronized to abeat by a user.

FIG. 14 is a block diagram of an illustrative embodiment of an amplifiermodule;

FIG. 15 is a block diagram of another illustrative embodiment of anamplifier module;

FIG. 16 is a flowchart to illustrate a particular embodiment of a methodof operation of an amplifier module of an audio demonstration kit;

FIG. 17 is a flowchart to illustrate another particular embodiment of amethod of operation of an amplifier module of an audio demonstrationkit;

FIG. 18 is a flowchart to illustrate another particular embodiment of amethod of operation of an amplifier module of an audio demonstrationkit; and

FIG. 19 is a flowchart to illustrate a particular embodiment of a methodof actuating a motion element and synchronizing movement of the motionelement to a video frame rate of a video recording device.

VI. DETAILED DESCRIPTION

An audio demonstration kit encourages understanding of audio concepts byenabling children to construct and study speaker performance. In aparticular embodiment, the audio demonstration kit includes a paperspeaker and instructions. The paper speaker includes a backplate, asuspension, and a diaphragm cut from a single sheet of paper. The audiodemonstration kit may feature an amplifier that is configurable toaccommodate various hardware additions as a child is ready for moreprogressively challenging construction. For example, the amplifier of anembodiment allows single and dual mode operation, as well as drives arotary motor and is coordinated with a strobe light. The amplifier of anembodiment is synchronized with the strobe light and a moveable platformto create the impression of that jiggling figures attached to the tableare dancing. Interfaces with smart phone, recording, and othertechnologies further enhances and encourages the learning experience.

FIG. 1 is a diagram 100 depicting two sides (designated side A and sideB) of a single sheet of paper that is manipulatable to create (e.g.,form or assemble) a paper speaker. Side B is the reverse of side A andvice versa. A first pattern 101 is printed on side A of the piece ofpaper, and a second pattern 102 is printed on side B of the piece ofpaper. In a particular embodiment, the patterns 101 and 102 are printedon opposite sides of a piece of paper printed on 32 lb. paper stock.Each pattern 101 and 102 includes six rectangular sections, designatedin FIG. 1 as sections 103, 110, 108, 104, 106, and 112 respectively.Each pattern 101 and 102 also includes three flap sections 114, 116, and118. Corresponding sections on each side of the single sheet of paperare referenced using the same reference number. Thus, the section 108 ison the left-hand side on side A but the right hand side on side B.

In the first pattern 101, the flap section 114 is separated from thesection 103 by a line segment 120. The section 103 is separated from thesection 110 by a line segment 122. The flap section 116 is separatedfrom the section 108 by a line segment 134. The section 108 is separatedfrom the section 110 by a line segment 132. The section 110 is separatedfrom the section 104 by a line segment 130. The section 110 is separatedfrom the section 106 by a line segment 124. The section 106 is separatedfrom the section 112 by a line segment 126. The sections 104 and 118 areseparated by a line segment 128. Each of the line segments represents aline along which the sheet of paper is scored and folded duringconstruction of the paper speaker, as further described herein.

In a particular embodiment, the single sheet of paper includes (e.g.,printed thereon) instructions regarding how to assemble the paperspeaker. For example, as shown in FIG. 1, side A includes instructionssuch as “Score & Fold,” “Tape,” “MAGNET” (attach a magnet incorresponding area 140), and “WIRE COIL” (attach a wire coil incorresponding area 142).

The first pattern 101 and the second pattern 102 enable construction ofa paper speaker from a single sheet of paper. Once the sections 103-118are cut from the piece of paper and the instructions are followed, thesection 103, the section 104, the section 106, and the section 108 forma suspension of the paper speaker. The section 110 forms a backplate ofthe paper speaker, and the section 112 forms a diaphragm of the paperspeaker. The “backplate” of the paper speaker is the panel of the paperspeaker that the magnet is attached to. In a particular embodiment, thebackplate is designed to rest against a fixed or sturdy surface, such asa table, to prevent the backplate from deforming during operation. The“diaphragm” of the paper speaker is the portion of the paper speakerthat oscillates to generate sound waves. The “suspension” of the paperspeaker holds the diaphragm in place and enables the diaphragm tomaintain its shape.

Referring to FIG. 2, a diagram 200 depicting the constructed paperspeaker is shown. The constructed paper speaker includes the sections103-118, a magnet 210 and a wire coil 212. In the illustrated example,the magnet 210 is a cylinder magnet. The wire coil 212 is positionedover and around the magnet 210. A method of folding the single sheet ofpaper to position the wire coil 212 over the magnet 210 is furtherdescribed with reference to FIG. 5.

During operation, a current is selectively passed through the wire coil212 to generate a magnetic field that interacts with a magnetic field ofthe magnet 210 to generate a magnetic force. The magnetic force drivesthe section 112 (the diaphragm) of the paper speaker. The section 112,in turn, displaces air and produces sound. The sections 103-108 (thesuspension) provide a restorative force, in a direction opposite of themagnetic force, to the section 112 so that the paper speaker maintainsits shape. It will thus be appreciated that the paper speaker describedwith reference to FIGS. 1 and 2 can be included in an audiodemonstration kit and constructed by a user (e.g., a preteen orteenager, a hobbyist, etc.) by following instructions printed on thepaper speaker and can be examined to learn about scientific conceptssuch as electricity, magnetism, transduction, sound, etc.

Referring to FIG. 3, an illustration 300 of components of an audiodemonstration kit is shown. The audio demonstration kit includes a sheetof paper 310. In an illustrative embodiment, the sheet of paper 310 isthe sheet of paper described with reference to FIG. 1. For example, thesheet of paper 310 includes the first pattern 101 of FIG. 1 on a firstside and the second pattern 102 (not shown) on a second side (notshown). The audio demonstration kit further includes a bobbin 312 and awire 314 having a particular length wire. In the illustrated example,the bobbin 312 is a plastic cylinder bobbin. The audio demonstration kitfurther includes the magnet 210.

The audio demonstration kit includes an amplifier 320, which isalternatively referred to herein as an amplifier module or an amplifiercircuit board. The amplifier 320 includes a strobe light 322 and astrobe control 324 (e.g., −5 Hz to +5 Hz and/or 0 degree phase to 360degree phase), which is illustrated in FIG. 3 as a rotary knob. Theamplifier 320 further includes a volume control 326 and a tone control328 (e.g., 10 Hz to 100 Hz), which are illustrated in FIG. 3 as rotaryknobs. The amplifier 320 includes a right channel output port 334 and aleft channel output port 336. The amplifier 320 also includes a firstset of electrical contacts 335 associated with the right channel outputport 334 and a second set of electrical contacts 337 associated with theleft channel output port 336. The amplifier 320 further includes aninput port 338 configured to receive audio input from an audio deviceand a power connector 340 configured to receive power from a powersource (e.g., an alternating current (AC) power source or a directcurrent (DC) power source). The audio demonstration kit further includesa power supply unit (PSU) 350. In particular embodiments, the PSU 350 isa 12 volt battery-powered source. In an alternative embodiment, the PSU350 is a 12 volt non-battery source (e.g., a power adapter connectableto an electrical outlet).

In a particular embodiment, the amplifier 320 includes a first switch330 and a second switch 332. The first switch 330 is configured toswitch the amplifier 320 between operating in a monaural (e.g.,single-channel) mode and operating in a stereo (e.g., dual-channel)mode. In the monaural mode, the amplifier 320 outputs an audio signal toa single speaker. In the stereo mode, the amplifier 320 outputs audiosignals to two speakers. The second switch 332 is configured to switchthe amplifier 320 between delivering right and left audio signalsthrough the right channel output port 334 and the left channel outputport 336 and commutating current through the right channel output port334 and the left channel output port 336 to drive a rotary motor, asfurther described with reference to FIGS. 11B and 11C.

In a particular embodiment, the audio demonstration kit includes a firstalligator clip cable 342 and a second alligator clip cable 344. Theaudio demonstration kit further includes a first audio cable 346. Theaudio demonstration kit includes a second audio cable 345 and a thirdaudio cable 347. The amplifier 320 can be connected to a device 348,such as a mobile phone, a tablet computer, and/or a portable mediaplayer with the first audio cable 346. In particular embodiments, thefirst audio cable 346 is a universal serial bus (USB) cable or a 3.5 mmaudio cable. The second audio cable 345 and the third audio cable 347are used to connect the amplifier 320 to left and right speakers. Theaudio demonstration kit further includes instructions 360 directing auser to use illustrated components to assemble audio demonstrationitems, such as a paper speaker, a cardboard speaker, an amplifier and acontrol unit, etc. In a particular embodiment, the instructions 360 areprinted on the sheet of paper 310 (e.g., in the margins of the sheet ofpaper 310 around the first pattern 101). Alternately, the instructionsare printed in a separate booklet.

In a particular embodiment, the instructions 360 direct a user to windthe wire 314 around the bobbin 312 to create the wire coil 212. The wirecoil 212 and the magnet 210 are attached (e.g., taped) to the sheet ofpaper 310 and the sheet of paper 310 is folded, as described withreference to FIGS. 1, 2, and 5, to create a paper speaker. The wire coil212 is connected to the amplifier 320 via the first alligator clip cable342 and the second alligator clip cable 344. The first alligator clipcable 342 and the second alligator clip cable 344 connect to a positiveterminal and a negative terminal of either the first set of electricalcontacts 335 or the second set of electrical contacts 337.

The PSU 350 is connected to the power connector 340 and delivers powerto the amplifier 320. The device 348, when connected to the input port338 via the first audio cable 346, delivers an audio signal to theamplifier 320. The amplifier 320 amplifies the audio signal and outputsthe amplified audio signal to the paper speaker via the first alligatorclip cable 342 and the second alligator clip cable 344. The amplifiedaudio signal is passed through the wire coil 212 generating a magneticfield. The magnetic field interacts with a magnetic field of the magnet210 creating an alternately repelling or attracting force, depending ona direction of current through the wire coil 212. The repelling forcepushes the wire coil 212 away from the magnet 210 and the attractingforce pulls the wire coil 212 toward the magnet 210, causing thediaphragm of the paper speaker to oscillate (e.g., vibrate) back andforth. The oscillation of the diaphragm causes oscillating changes inair pressure that are detectable by a human ear as sound.

It should be noted that the various components illustrated in FIG. 3 arefor example and not to be considered limiting. In alternate embodiments,more, fewer, or different components may be included in an audiodemonstration kit.

FIG. 4 shows a perspective view of an embodiment of an amplifier 420.The amplifier 420 may be similar to the block diagram representation ofthe amplifier 320 shown in FIG. 3, for example. The amplifier 420includes various user input mechanisms operable to control circuitry 401housed within the amplifier 420. More particularly, the amplifier 420includes a strobe control 403 and a tone control 405. As shown in FIG.4, the strobe control 403 and the tone control 405 comprisepotentiometers (e.g., sliders). However, controls of other embodimentsinclude other user input mechanisms, such as surface that sense a usertapping to a musical beat, or controls implemented on a tablet orsmartphone and communicated over a control channel to the amplifiersystem. The tapping or sliding of potentiometer facilitatessynchronization of the beat and a strobe light, for instance. A playbutton 407 and a stop button 409 further receive user input. Theamplifier 420 additionally features an auxiliary port 411, as well as aright channel output port 413 and a left channel output port 415. Theamplifier 420 further includes a power input port 417 to receive powerfrom an AC or DC power source. A rotary knob 419 is configured to adjustvolume.

Referring to FIG. 5, a diagram 500 that illustrates assembling of thepaper speaker of FIG. 2 is shown. At step 1, the wire 314 is woundaround the bobbin 312 to form the wire coil 212. In one example, thewire 314 is at least 25 feet long and is tightly wound at least 100times around the bobbin 312. At step 2, the magnet 210 and the wire coil212 are placed (e.g., attached using tape) on the sheet of paper 310.For example, referring to FIG. 1, the magnet 210 may be attached to theregion denoted “MAGNET” and the wire coil 212 may be attached to theregion denoted “WIRE COIL.” At step 3, the paper 310 is scored andfolded as indicated, so that the wire coil 212 is positioned over andaround the magnet 210. In step 4, additional panels of the paper speakerare then folded and/or taped to generate an enclosed paper speaker 402according to the instructions printed in the first pattern 101, as shownin FIG. 1.

Referring to FIG. 6, a diagram 600 of an illustrative embodiment of anaudio demonstration kit including stereo speakers constructed frompackaging of the audio demonstration kit is shown. The audiodemonstration kit includes a right speaker 502 (e.g., a first user-builtspeaker), the second audio cable 345, the amplifier 320, the third audiocable 347, and a left speaker 512 (e.g., a second user-built speaker).The right speaker 502 includes a first cardboard box 504 and a firstacoustic transducer 506. The first acoustic transducer 506 is attachedto the first cardboard box 504, and the walls of the cardboard box 504form a backplate, a suspension, and a diaphragm. In a particularembodiment, the first acoustic transducer 506 includes a magnet and awire coil, as described with reference to the paper speaker of FIGS. 1,2, and 5. The left speaker 512 includes a second cardboard box 514 and asecond acoustic transducer 516. The second acoustic transducer 516 isattached to the second cardboard box 514, and the walls of the secondcardboard box 514 form a backplate, a suspension, and a diaphragm. Thesecond acoustic transducer 516 includes a second magnet and a secondwire coil, as described with reference to the paper speaker of FIGS. 1,2, and 5.

In a particular embodiment, the first cardboard box 504 and the secondcardboard box 514 form at least a part of the packaging of the audiodemonstration kit (e.g., the audio demonstration kit is contained withthe first cardboard box 504 and the second cardboard box 514, and thecardboard boxes 504 and 514 are attached to each other, when the audiodemonstration kit is sold). In particular embodiments, the packagingfurther includes all or some of the additional audio demonstration kitcomponents illustrated in FIG. 3 (e.g., the first alligator clip cable342, the second alligator clip cable 344, the instructions 360, thesheet of paper 310, the wire 314, the magnet 210, the bobbin 312, thefirst audio cable 346, and/or the PSU 350).

The right speaker 502 is connected to the amplifier 320 via the secondaudio cable 345. In a particular embodiment, the second audio cable 345connects to the right channel output port 334 of the amplifier 320. Theleft speaker 512 is connected to the amplifier 320 via the third audiocable 347. In a particular embodiment, the third audio cable 347connects to the left channel output port 336 of the amplifier 320. In aparticular embodiment, instructions such as the instructions 360 of FIG.3 describe assembly of the audio demonstration kit.

For example, FIGS. 7 and 8 illustrate embodiments of packaging for anaudio demonstration kit and are generally designated 700 and 800,respectively. The packaging includes the first cardboard box 504 and thesecond cardboard box 514, each of which can form a partial enclosure fora user-built speaker. When the audio demonstration kit is purchased, thecardboard boxes 504 and 514 form a complete enclosure that enclosesother components of the audio demonstration kit. For example, theamplifier 320, the magnet 210, the wire 314, the power supply unit 350,the acoustic transducers 506 and 516, the instructions 360, and/or thecables 345 and 347 can be included within packaging of the audiodemonstration kit. In some embodiments, one or more pre-fabricatedtransducers 710 are included instead of the magnet 210, the bobbin 312,and the wire 314. It should be noted that although not shown in FIGS. 7and 8, all or some of the additional audio demonstration kit componentsdescribed herein can also be included within the packaging of the audiodemonstration kit. In particular embodiments, one cardboard box formsthe enclosure and the other cardboard box fits inside the enclosure.Thus, the audio demonstration kit of FIGS. 7 and 8 may be sold, shipped,and stored in a small space, because packaging of the audiodemonstration kit can be reused during construction of user-builtspeaker(s).

It should be noted that various embodiments described herein arecombinable. For example, FIG. 9 is a diagram of an illustrativeembodiment of a mixed mode audio demonstration kit, designated 900. Themixed mode audio demonstration kit 900 includes the paper speaker 402,the amplifier 320, and a cardboard speaker (e.g., the left speaker 512).In a particular embodiment, the paper speaker 402 includes the sheet ofpaper 310, the wire coil 212, and the magnet 210. In the example of FIG.9, the paper speaker 402 acts as a right speaker. The left speaker 512includes the cardboard box 514 and the second acoustic transducer 516.

The speakers 402 and 512 are connected to the amplifier 320, whichincludes the first switch 330, the right channel output port 334, andthe left channel output port 336. Depending on implementation, thespeakers 402 and 512 may be connected to the amplifier 320 using one ortwo cables. For example, in FIG. 9, the paper speaker 402 is connectedto the right channel output port 334 (or electrical contacts associatedtherewith) via the first alligator clip cable 342 and the secondalligator clip cable 344. One of the cables may be connected to apositive (+) terminal and the other cable may be connected to a negative(−) terminal. In particular embodiments, the positive and negativeterminals are indicated by particular colors. For example, the positiveterminal may be indicated by red and the negative terminal may beindicated by black. The left speaker 512 is connected to the leftchannel output port 336 via the third audio cable 347. It should benoted that the use of one paper speaker and one cardboard speaker is forexample only. In alternate embodiments, the mixed mode audiodemonstration kit 900 includes two paper speakers or two cardboardspeakers.

When the first switch 330 is in a first position, the amplifier 320operates in a stereo mode. When operating in the stereo mode, theamplifier 320 delivers amplified audio signals to both of the outputports 334 and 336. When the first switch 330 is in a second position,the amplifier 320 operates in a monaural mode. When operating in themonaural mode, the amplifier 320 delivers an amplified audio signal toone, but not both, of the output ports 334 and 336. In a particularembodiment, the amplifier 320 outputs the amplified audio signals to thepaper speaker 402 in the monaural mode. In one example, the amplifier320 generates amplified audio signals based on an input audio signalreceived from the device 348 via the input port 338, as shown.

FIG. 10 shows an embodiment of an audio demonstration kit 940 thatincludes speakers 942, 944 that are constructed and deconstructed in arepeatable manner. The first speaker 942 is connected to an amplifier420 via a cable 946, and the second speaker 944 is connected to theamplifier 420 via cable 948. The first speaker 942 includes speakerelements that include a cone 951, as well as a magnet and coil (notshown). Similarly, the second speaker 944 includes a cone 952 and otherspeaker elements.

The speaker elements are partially enclosed within an enclosure 954 ofthe first speaker 942. A lid 956 aligns with the edges of the enclosure954 to repeatably form a seal and at least a partial enclosure.Similarly, an enclosure 958 aligns with a lid 960 to enclose speakerelements of the second speaker 944. The enclosures 954, 958 and lids956, 960 are constructed from rigid or semi-rigid materials to assist achild in aligning (via rigid guide structures inside of the enclosures954, 958) and creating a seal while learning how to build a speakersystem. The speaker elements are likewise configured to be repeatablyaligned and deconstructed to encourage experiment and understanding. Theenclosures, or partial enclosures, of an embodiment are modular in thatsmaller partial enclosures are combined to create a larger enclosure.Enclosures manufactured from rigid or flexible materials are combinedusing snaps, grooves, rubber bands, magnets, adhesive or other knownfastening mechanisms. Attachment of the enclosures 954, 958 and lids956, 960 produces a satisfying tactile response, such as a snap, toreinforce that an effective seal has been achieved.

Referring to FIG. 11A, a diagram of an illustrative embodiment of anaudio demonstration kit that includes an oscillating element is shown.In FIG. 11A, the paper speaker 402 is connected to the right channeloutput port 334 via the first alligator clip cable 342 and the secondalligator clip cable 344. When the second switch 332 is in a firstposition (e.g., indicates a first mode), the amplifier 320 outputs anamplified audio signal to the paper speaker 402. The output induces amagnetic field in the wire coil 212, which interacts with a magneticfield of the magnet 210 to move a diaphragm of the paper speaker 402back and forth. The back and forth movement of the diaphragm of thepaper speaker 402 produces oscillations in air pressure detectable assound. When the second switch 332 is in a second position (e.g.,indicates a second mode), the amplifier 320 commutates current in thewire coil 212 to move the diaphragm of the paper speaker 402 back andforth as an oscillating element. For example, the oscillating elementactuates a motion element 950 attached to the diaphragm. In FIG. 11A,the motion element 950 is a user-made paper sculpture. For example, anaudio demonstration kit may include a paper template for the papersculpture and instructions directing a user to make the paper sculpturefrom the template.

In alternate embodiments, the amplifier 320 also commutates current in asecond coil connected to the left channel output port 336 to produce theback and forth movement of the oscillating element. In a particularembodiment, output sent to the oscillating element is low frequencyoutput. In some embodiments, the output sent to the oscillating elementis synchronized with the strobe light 322 and the frequency of thestrobe light 322 is controlled by the strobe control 324, as furtherdescribed herein.

Referring to FIG. 11B, a rotary motor 902 is shown connected to theamplifier 320. The rotary motor 902 includes a first wire coil 926, asecond wire coil 928, and a magnet 930. The magnet 930 is positioned(e.g., mounted) so as to revolve around an axis 924, such that a firstend of the magnet 930 and a second end of the magnet 930 pass in closeproximity to the first wire coil 926 and the second wire coil 928. Therotary motor 902 is illustrated in further detail in FIG. 11C. A commonplane intersects the rotating magnet 930, the first wire coil 926, andthe second wire coil 928. The first wire coil 926 lies in a first plane(e.g., corresponding to the bottom panel in FIG. 11B), and the secondwire coil 928 lies in a second plane (e.g., corresponding to the leftside panel in FIG. 11B). The first plane and the second plane areperpendicular to each other. Further, orthogonal vectors of both thefirst plane and the second plane are perpendicular to the axis 924. Thefirst wire coil 926 is connected to the left channel output port 336 (orelectrical contacts associated therewith) via alligator clip cables 932and 934. The second wire coil 928 is connected to the right channeloutput port 334 via the first alligator clip cable 342 and the secondalligator clip cable 344. When the second switch 332 indicates thesecond mode, the amplifier 320 commutates current in the first wire coil926 and the second wire coil 928 causing the magnet 930 to rotate aboutthe axis 924. In particular embodiments, the rotary motor 902, the thirdalligator clip cable 932, and the fourth alligator clip cable 934 areincluded in the packaging of the audio demonstration kit described withreference to FIG. 3 or FIG. 6. It will thus be appreciated that themagnet 930 rotating about the axis 924 can be used to demonstrate how arotary motor functions.

Referring to FIG. 12, an illustrative embodiment of an audiodemonstration kit 920 that includes a motion element 950 is shown. Theaudio demonstration kit 920 includes a video recording device (e.g., acamera 1046), the paper speaker 402 operating as an oscillating element,and the amplifier 320. In particular embodiments, the camera 1046 isintegrated into a mobile phone, a portable computing device, a tabletcomputing device, a portable media player, a gaming device, or anycombination thereof. The motion element 950 is attached to theoscillating element, as shown.

During operation, the amplifier 320 operating in the second modecommutates current in the wire coil 212 of the paper speaker 402,causing the diaphragm of the paper speaker 402 to oscillate. Theoscillation of the diaphragm actuates the motion element 950 by pushingand pulling the motion element 950 back and forth. In other embodiments,a different motion element is used (e.g., a small plastic figurine,etc.).

In FIG. 12, the strobe control 324 is illustrated as a rotary knob. Whenthe strobe light 322 of the amplifier 320 is switched on by the strobecontrol 324, the amplifier 320 causes the strobe light to flash at aparticular strobe frequency. When the strobe control 324 is turned to afirst position, the amplifier 320 operates the strobe light 322 in aphase mode. When the strobe control 324 is turned to a second position,the amplifier 320 operates the strobe light 322 in a delta mode. Whenthe strobe light 322 is operating in the phase mode, the strobefrequency corresponds to a phase of the oscillations of the paperspeaker 402, causing the strobe light 322 to flash when the motionelement 950 is at a particular position. Therefore, flashing the strobelight 322 in phase with the paper speaker 402 causes the motion element950 to appear to be “frozen” in place despite the fact that the motionelement 950 is oscillating with the paper speaker 402. In the deltamode, the strobe light 322 flashes out of phase with the oscillations ofthe paper speaker 402. Therefore, in the delta mode, the strobe light322 flashes when the motion element 950 is in various stages ofoscillation. When, the strobe light 322 is operating in the delta mode,the strobe frequency is adjustable via the strobe control 324 (e.g.,turning the strobe control 324 adjusts the strobe frequency). Adjustingthe strobe frequency causes oscillations of the motion element 950 tochange in speed. In alternative embodiments, separate controls are usedto switch the amplifier 320 between the phase mode and the delta modeand to adjust the strobe frequency.

The camera 1046 captures frames of video of the motion element 950 at aparticular capture rate (or frame rate). In the illustrated embodiment,the amplifier 320 communicates with the camera 1046 via a cable 1050. Ina particular embodiment, the amplifier 320 synchronizes one or both ofthe strobe frequency or the movement of the motion element 950 to theframe rate of the camera 1046. In a particular embodiment, the amplifier320 receives an indication of the capture rate or frame rate of thecamera 1046 via the cable 1050 (or a wireless connection) and adjuststhe strobe frequency accordingly. In alternative embodiments, theamplifier 320 adjusts the frame rate of the camera 1046 to match thestrobe frequency or the movement of the motion element 950.

It will be appreciated that adjusting the strobe mode and frequency canbe used to demonstrate concepts such as oscillation time period,frequency, and frame rate.

FIG. 13 is a perspective view of an audio demonstration kit 970 thatincludes an amplifier 420 and moveable assembly 972 that a usersynchronizes to a beat. The amplifier 420 is an embodiment of theamplifier 320 of FIG. 12. A strobe light, such as the strobe light 322of FIG. 12, is likewise synchronized to the moveable assembly 972, andpossibly, to a frame rate of a video recording device. Flexible elements978 may appear to dance in response to actuation of the moveableassembly 972 and operation of the strobe light.

At least one of the movement of a moveable platform 976 and theactivation of the strobe light is coordinated with a frame rate of thevideo recording device. For example, the camera 1046 of FIG. 12, whichmay include a camera of a smart phone, is used as a basis to set afrequency of the strobe light. The strobe light is initially timed to adefault setting that corresponds to a common frame rate. A user mayadjust the setting using an input mechanism on the amplifier 420 to setthe frame rate to enable effective video recording. The amplifier 420may subsequently retain the adjusted frame rate for future use.

The flexible elements 978 include interlocking pieces of a material thatwobbles and bounces as the platform 976 is moved. Movement of anembodiment of the platform 976 selectively includes horizontal andvertical actuation, and is actuated by movement of a base section 974.As shown, the flexible elements 978 are punched or cut out of a flatconstruction kit. The flexible elements 978 are manufactured frommaterials of differing flexibility (e.g., rigidity) characteristics andmay be color coded to for ease of distinguishing. Flexible elements ofvarying dimensions are contemplated, such as blocks. Flexible elementsmay be compatible with proprietary interlocking construction toys. Theflexible elements 978 attach to the platform 976 using projections 980or other fasteners. The flexible elements 978 may attach to one anotherto allow a child to construct composite sculptures.

A user actuates a button or potentiometer on the amplifier 420 in timewith the beat of music to cause the moveable assembly 972 to move. Inanother embodiment, a user input circuit includes a surface of theamplifier 420 that registers a tap (e.g., to a musical beat) by theuser. When used in connection with at least one of the strobe light andvideo camera, the flexible elements 978 move in interesting ways thatmake the sculptures appear to come alive. Movement of the flexibleelements 978, including when sculptures are shaken apart, is studiedusing recorded video.

The user synchronizes the dancing movement to music using the user inputcircuitry. For instance, the user synchronizes the music by tapping orsliding a control as they feel compelled by beat of music. When thestrobe light is illuminated, the flexible elements 978 appear to danceto the music. This feature allows the user to feel a connection betweentheir performance and performance of a jiggling sculpture comprised ofthe flexible elements 978. In this manner, the user input (relating tomusic) synchronizes and otherwise coordinates operation of the strobelight and the movement of the moveable assembly 972 to one another. Theflexible elements of an embodiment are compatible with other popular orproprietary building and constructions sets (made of rigid or semi rigidelements). While strobe lights and video cameras are discussed herein,another embodiment uses a spinning disk with slits or in combinationwith the strobe light system (e.g., to essentially provide an experienceof a user's eye like would a camera have with shutters).

FIG. 14 is a block diagram of an illustrative embodiment of an audiodemonstration kit 1100. The audio demonstration kit 1100 includes anamplifier module 1120 and one or more user-built speakers 1190. In anillustrative embodiment, the amplifier module 1120 corresponds to theamplifier 320. In an illustrative embodiment, the user-built speakers1190 correspond to the paper speaker 402, the right speaker 502, and/orthe left speaker 512.

The amplifier module 1120 includes a tone control 1128, a volume control1126, and a strobe control 1124. In particular embodiments, the tonecontrol 1128, the volume control 1126, the strobe control 1124, or anycombination thereof are rotary knobs or other potentiometers (e.g.,sliders) configured to receive user input regarding tone, volume, and/orstrobe light adjustment. In alternative embodiments, the tone control1128, the volume control 1126, the strobe control 1124, or anycombination thereof are digital input devices. The amplifier module 1120further includes an audio input 1180, a processor 1182, a strobe driver1188 (e.g., a strobe generator), a strobe 1122, a power amplifier 1184,and a connector 1186. The user-built speakers 1190 each include aconnector, designated in FIG. 11 as connectors 1192 and 1194respectively.

In operation, the processor 1182 receives an audio signal via the audioinput 1180. The audio signal can be received from an electronic device(e.g., a microphone, a mobile phone, a tablet computer, a portable mediaplayer, etc.). In addition, the processor 1182 receives control signals(such as from the tone control 1128 and the volume control 1126). Basedon the control signals, the processor 1182 manipulates the audio signal.For example, the processor 1182 increases or decreases volume of theaudio signal based on a control signal received from the volume control1126. The processor 1182 raises and lowers pitch of the audio signal(e.g., by varying a speed at which a direction that current passedthrough the user-built speakers 1190 switches back and forth) inresponse to a control signal received from the tone control 1128. Aftermanipulating the audio signal in response to the audio control signals,the processor 1182 sends the audio signal to the power amplifier 1184.

The power amplifier 1184 amplifies the audio signal and provides theamplified audio signal(s) to the connector 1186. The connector 1186provides the amplified audio signal(s) to one or both of the connectors1192, 1194 of the user-built speakers 1190. For example, the amplifiermodule 1120 can operate in either a monaural mode or in a stereo mode.When operating in the monaural mode, the connector 1186 provides theamplified audio signal to either the connector 1192 or the connector1194, but not both. When operating in the stereo mode, the connector1186 provides the amplified audio signal to both the connector 1192 andthe connector 1194.

The processor 1182 also receives a strobe control signal from the strobecontrol 1124. In response to the strobe control signal, the processor1182 sends a signal to the strobe driver 1188 to control a frequency atwhich the strobe driver 1188 provides power to the strobe 1122 (e.g., alight source) to generate a flashing light. In a particular embodiment,the frequency is determined based at least in part on a frequency of theaudio signal. In some embodiments, the amplifier module 1120 is incommunication with a recording device, and the frequency is determinedbased at least in part on a frame rate of the recording device.Alternatively, the frame rate of the recording device is set by theamplifier module 1120 based on the frequency.

FIG. 15 is a block diagram 1200 of an illustrative embodiment of anamplifier module 1220. The amplifier module 1220 includes a buffer 1240,a microcontroller 1250, a low pass filter 1252, a mixer 1242, a volumemodule 1244, a power amplifier 1246, and printed circuit board terminals1248. According to an embodiment, the low pass filter 1252, the mixer1242, and the volume module 1244 are functions executed by a digitalsignal processor (DSP). The amplifier module 1220 further includes aprotection and load switch 1256 and a strobe driver 1258.

In operation, the protection and load switch 1256 is responsive to apower switch 1254. When the power switch 1254 is switched in a first(e.g., “on”) position, the protection and load switch 1256 providespower from a power source 1260 (e.g., the PSU 350) to themicrocontroller 1250, to the power amplifier 1246, to the strobe driver1258, and to a power/status indicator 1262. The buffer 1240 receives anaudio signal via the audio input 1280 (e.g., from an external device,such as the device 348) and provides the audio signal to the mixer 1242.The microcontroller 1250 receives a tone control signal from the tonecontrol 1228 and passes the tone control signal through the low passfilter 1252 to the mixer 1242. The mixer 1242 adjusts the tone of theaudio signal based on the tone control signal received from the tonecontrol 1228 and provides the adjusted audio signal to the volume module1244.

In particular embodiments, the mixer 1242 provides a left audio signaland a right audio signal to the volume module 1244 to be sent to thepower amplifier 1246. The power amplifier 1246 provides an amplifiedleft audio signal to a left terminal of the printed circuit boardterminals 1248 and an amplified right signal to a right terminal of theprinted circuit board terminals 1248. One or both of the user-builtspeakers 1190 generate sound based on the received amplified audiosignal(s).

The volume module 1244 receives a volume control signal from the volumecontrol 1226, adjusts a volume (e.g., amplitude) of the audio signalbased on the volume control signal, and provides the adjusted audiosignal to the power amplifier 1246. The volume module 1244 adjusts theamplitude of the audio signal by increasing or decreasing current thatflows as part of the signal to the power amplifier 1246. The poweramplifier 1246 amplifies the adjusted audio signal and provides theamplified audio signal to the printed circuit board terminals 1248 to beoutput to speakers (e.g., user-built speakers, such as a paper speakeror a cardboard speaker as described herein).

In addition, when a strobe control 1224 is switched “on,” themicrocontroller 1250 receives a strobe control signal from the strobecontrol 1224. In response to the strobe control signal, themicrocontroller 1250 activates the strobe driver 1258. The strobe driver1258 drives the strobe 1264 to generate a flashing light. A frequency ofthe flashing light may be determined based in part on the strobe controlsignal, a frequency of the audio signal, a frame rate of a camera, orany combination thereof.

It will thus be appreciated that an audio demonstration kit thatincludes the amplifier module 1120 of FIG. 14 or the amplifier module1220 of FIG. 15 can be used to demonstrate scientific concepts, such aselectricity, magnetism, transduction, sound, light frequency, and framerate to a user. For example, the amplifier module 1120 can be used inconjunction with speakers to demonstrate how speakers translateelectrical signals to sound (e.g., by causing the wire coil 212 to drivethe paper speaker 402).

Referring to FIG. 16, a flowchart of a particular embodiment of a method1300 of operation at an amplifier module is shown. In an illustrativeembodiment, the amplifier module is the amplifier 320, the amplifiermodule 1120, or the amplifier module 1220.

The method 1300 includes receiving an input audio signal at an amplifiermodule of an audio demonstration kit, at 1302. The method 1300 alsoincludes generating a first amplified audio signal based on the inputaudio signal, at 1304. The method 1300 further includes transmitting thefirst amplified audio signal to at least one speaker constructed frompackaging of the audio demonstration kit, at 1306. For example, as shownin FIG. 15, the amplifier module 1220 receives the input audio signal(e.g., from an external audio device, such as a mobile phone or a tabletcomputer) and outputs amplified audio signals to one or more speakers(e.g., user-built speakers).

The method 1300 includes receiving a control signal at the amplifiermodule at 1308. For example, the control signal may correspond to a tonecontrol or a volume control. The method 1300 also includes generating asecond amplified audio signal according to the control signal, at 1310,and transmitting the second amplified audio signal to the at least onespeaker, at 1312. For example, as shown in FIG. 15, the amplifier module1220 can receive a tone control signal from the tone control 1228 and/ora volume control signal from the volume control 1226, and the amplifiermodule 1220 can adjust the amplified audio signal output to the speakersaccordingly.

The method 1300 may thus enable an amplifier to adjust audio signalssent to user-built speakers such as speakers made out of packaging of anaudio kit.

Referring to FIG. 17, a flowchart of another particular embodiment of amethod 1400 of operation at an amplifier module is shown. In anillustrative embodiment, the amplifier module is the amplifier 320, theamplifier module 1120, or the amplifier module 1220.

The method 1400 includes receiving mode input at an amplifier module ofan audio demonstration kit, at 1402. The amplifier module includes afirst output and a second output. The amplifier module is also connectedto a first cardboard speaker formed from a packaging of the audiodemonstration kit and/or a second paper speaker having at least adiaphragm and a suspension collectively formed from a single sheet ofpaper. The method 1400 includes determining a mode indicated by the modeinput, at 1403. The method 1400 also includes, when the mode inputindicates a monaural mode, outputting audio signals via one but not bothof the first and second outputs, at 1404. For example, when the firstswitch 330 indicates the monaural mode, the amplifier 320 delivers audiosignals to one but not both of the output ports 334 and 336. When themode input indicates a stereo mode, the method 1400 includes outputtingaudio signals via both the first and second outputs, at 1406. Forexample, when the first switch 330 indicates the stereo mode, theamplifier 320 delivers audio signals to both of the output ports 334 and336.

Referring to FIG. 18, a flowchart of another particular embodiment of amethod 1500 of operation at an amplifier module is shown. In anillustrative embodiment, the amplifier module is the amplifier 320, theamplifier module 1120, or the amplifier module 1220.

The method 1500 includes receiving mode input at an audio amplifier, at1502. The method 1500 includes determining a mode indicated by the modeinput, at 1503. The method 1500 also includes, when the mode inputindicates a first mode, delivering an amplified audio signal to at leastone of a left output or a right output of the audio amplifier, at 1504.For example, when the second switch 332 indicates the first mode, theamplifier 320 delivers amplified audio signal(s) via one or more of theoutput ports 334 and 336.

When the mode input indicates a second mode, the method 1500 includescommutating current in a first and second coil respectively connected tothe left and right output to drive at least one of a rotary motor or anoscillating element, at 1506. For example, when the second switch 332indicates the second mode, the amplifier 320 commutates current drive anoscillating element or a rotary motor, as described with reference toFIGS. 11A, 11B, and 11C.

Referring to FIG. 19, a particular embodiment of a method 1600 ofactuating a motion element and synchronizing movement of the motionelement to a video frame rate of a video recording device is shown. Inan illustrative embodiment, the method 1600 is performed by an amplifiermodule, such as the amplifier 320, the amplifier module 1120, or theamplifier module 1220.

The method 1600 includes receiving mode input at a controller of anaudio demonstration kit, at 1602. The controller is coupled to a tonegenerator (e.g., a speaker) and to a strobe light generator. Thecontroller is configured to synchronize movement of a motion element toa video frame rate of a video recording device. The method 1600 alsoincludes delivering a signal to the tone generator to actuate the motionelement, at 1604. For example, the amplifier 320 may deliver a signal tothe paper speaker 402, which causes the motion element 950 to move.

The method 1600 includes determining a mode indicated by the mode input,at 1605. The method 1600 further includes, when the mode input indicatesa phase mode, operating the strobe light generator to cause the strobelight to flash in accordance with a particular phase, at 1606. When themode input indicates a delta mode, the method 1600 includes operatingthe strobe light generator to cause the strobe light to flash at aparticular frequency, at 1608.

It is noted that some figures herein depict audio demonstration kitsprior to construction of various components (e.g., paper speakers),whereas other figures depict components after construction. This is forease of explanation only and not to be considered limiting.

Those skilled in the art may make numerous uses and modifications of anddepartures from the specific apparatus and techniques disclosed hereinwithout departing from the inventive concepts. For example, selectedembodiments of audio demonstration kits in accordance with the presentdisclosure may include all, fewer, or different components than thosedescribed with reference to one or more of the preceding figures. Thedisclosed embodiments should be construed as embracing each and everynovel feature and novel combination of features present in or possessedby the apparatus and techniques disclosed herein and limited only by thescope of the appended claims, and equivalents thereof.

The invention claimed is:
 1. An audio demonstration kit comprising: asingle sheet of paper defining a paper speaker including: a backsupport; a suspension; and a diaphragm configured to be driven by a wirecoil directly connected to the diaphragm and a magnet coupled to theback support, wherein the single sheet of paper is folded such that thewire coil is positioned proximate the magnet; a rotary motor; and anamplifier configured to switch between providing an audio signal tooperate the paper speaker and providing a current to operate the rotarymotor.
 2. The audio demonstration kit of claim 1, wherein the singlesheet of paper includes a set of instructions directing assembly of thepaper speaker.
 3. The audio demonstration kit of claim 2, wherein theset of instructions includes an instruction to fold the single sheet ofpaper along a line indicated on the single sheet of paper.
 4. The audiodemonstration kit of claim 2, wherein the set of instructions includesan instruction to attach a first portion of the single sheet of paper toa second portion of the single sheet of paper.
 5. The audiodemonstration kit of claim 2, further comprising a bobbin and a wire,the bobbin configured to guide wrapping the wire to form the wire coil.6. The audio demonstration kit of claim 5, wherein the bobbin comprisesa cylinder bobbin.
 7. The audio demonstration kit of claim 6, whereinthe set of instructions includes instructions directing assembly of thewire coil by winding the wire around the bobbin.
 8. The audiodemonstration kit of claim 7, wherein the single sheet of paperindicates a location at which to attach the wire coil directly to thesingle sheet of paper at a location of the diaphragm.
 9. The audiodemonstration kit of claim 1, wherein the amplifier is connectable tothe paper speaker.
 10. The audio demonstration kit of claim 9, furthercomprising at least one cable configured to connect the amplifier to thepaper speaker.
 11. The audio demonstration kit of claim 9, wherein theamplifier includes at least one connector that corresponds to at leastone output audio channel.
 12. The audio demonstration kit of claim 11,wherein the amplifier includes a first connector corresponding to a leftaudio channel and a second connector corresponding to a right audiochannel.
 13. The audio demonstration kit of claim 9, wherein theamplifier includes a tone control, a volume control, or a combinationthereof.
 14. The audio demonstration kit of claim 9, wherein theamplifier includes a connector configured to receive power from a powersupply.
 15. The audio demonstration kit of claim 9, wherein theamplifier includes an input configured to receive audio signals from anexternal device.
 16. The audio demonstration kit of claim 1, wherein thesingle sheet of paper includes a first tab corresponding to the backsupport and multiple suspension tabs corresponding to the suspension,wherein at least one of the suspension tabs is narrower than the firsttab such than an opening is defined between two or more of thesuspension tabs when the paper speaker is assembled.
 17. The audiodemonstration kit of claim 1, further comprising the magnet, wherein themagnet is a cylinder magnet.
 18. The audio demonstration kit of claim17, wherein the single sheet of paper indicates a location at which toattach the cylinder magnet to the single sheet of paper, the locationcorresponding to a portion of the back support.
 19. An audiodemonstration kit comprising: a magnet; a bobbin; a wire; and a singlesheet of paper defining a paper speaker including: a back support; asuspension; and a diaphragm configured to be driven by a coil of thewire directly connected to the diaphragm and the magnet coupled to theback support, wherein the single sheet of paper is folded such that thewire coil is positioned proximate the magnet; a rotary motor; and anamplifier configured to switch between providing an audio signal tooperate the paper speaker and providing a current to operate the rotarymotor.
 20. An audio demonstration kit comprising: a paper speakerincluding: a back support; a suspension; and a diaphragm configured tobe driven by a wire coil directly connected to the diaphragm and amagnet coupled to the back support, wherein a single sheet of paper isfolded such that the wire coil is positioned proximate the magnet; arotary motor; and an amplifier configured to switch between providing anaudio signal to operate the paper speaker and providing a current tooperate the rotary motor.